The Great American Eclipse is here, and millions of people are expected to watch the first total solar eclipse since 1979. Up to 7.4 million people will travel to the phenomenon's path of totality, and 12.25 million people already live in the region.

The National Park System, which spans more than 84 million acres across the U.S., is hosting many celebrations to commemorate the occasion. If you plan to travel to see the eclipse or live in its path of totality, here are some locations that are hosting special events:

The park will partner with the College of Charleston, NASA and the National Institute of Aerospace to broadcast the first live-stream eclipse filmed from cameras "dangling from high altitude balloons in the stratosphere."

The area is expected to witness a partial eclipse, where about 93 percent of the sun will be covered by the moon. The park's visitor center will have solar projection telescopes and will offer free eclipse glasses on a limited basis.

Guests can view the eclipse from the park's Great Meadow or Parade Ground. The site sits close to the path of totality and will experience a 99 percent eclipse. The park's visitor center and the Friends of Fort Vancouver bookstore will be open, where parents can buy eclipse glasses for their children.

Visitors will have free access to the event, but anyone who wishes to tour the former president's home is required to purchase tickets. Free eclipse glasses will be available on a first come, first serve basis.